EP1610932B1 - Verfahren und vorrichtung zur herstellung einer perforierten stoffbahn - Google Patents

Verfahren und vorrichtung zur herstellung einer perforierten stoffbahn Download PDF

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Publication number
EP1610932B1
EP1610932B1 EP03720856A EP03720856A EP1610932B1 EP 1610932 B1 EP1610932 B1 EP 1610932B1 EP 03720856 A EP03720856 A EP 03720856A EP 03720856 A EP03720856 A EP 03720856A EP 1610932 B1 EP1610932 B1 EP 1610932B1
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EP
European Patent Office
Prior art keywords
web
roller
fibres
nip
web material
Prior art date
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Expired - Lifetime
Application number
EP03720856A
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English (en)
French (fr)
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EP1610932A1 (de
Inventor
Claudio Giacometti
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Pantex International SpA
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Pantex International SpA
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/10—Means for treating work or cutting member to facilitate cutting by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/24—Perforating by needles or pins
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/559—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1056—Perforating lamina
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1056—Perforating lamina
    • Y10T156/1057—Subsequent to assembly of laminae
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing

Definitions

  • the present invention relates to a method and a device for the perforation of a web material, for producing a semi-finished product destined, for example, to manufacture baby diapers, sanitary towels, incontinence pads, filters or similar products in which a permeable layer or web must be provided which allows a fluid to pass through a plurality of perforations.
  • top-sheet In the production of absorbent products for personal hygiene, such as sanitary towels, baby diapers, incontinence pads or similar, sheets or layers of perforated web material are employed to constitute the top layer of the product, destined to come into contact with the skin of the user.
  • This layer is commonly known as "top-sheet”.
  • the top-sheet is constituted by a perforated plastic film. In other cases it is formed of a perforated nonwoven fabric. It is also possible to employ for this function combined products constituted by several nonwoven fabrics, several films or also by layers of different types, such as films and nonwoven fabrics or films and webs of unconsolidated fibres, joined together with various techniques.
  • EP-A-0598970 describes a method and a system to produce a perforated web material, in particular a film, but also a nonwoven fabric.
  • the web material is fed into a calender comprising two counter-rotating rollers defining a nip through which the material to be perforated is fed.
  • One of the two rollers is provided with protuberances and the other is substantially smooth and if necessary may have an elastically yielding cylindrical surface, or may be made of a hard material, such as steel or the like, analogously to the roller equipped with the protuberances.
  • the web material is perforated through the combined effect of the pressure between the two rollers, the temperature at which they are heated to and the difference in peripheral speed between the two rollers.
  • the roller equipped with protuberances is faster than the smooth roller and this causes an effect of deformation and tearing of the web material at the protuberances.
  • DE-A-2614160 describes a different method of perforation, again employing a smooth roller and a roller provided with protuberances. This method is described with specific reference to the perforation of nonwoven fabrics.
  • the object of the present invention is to provide a particularly efficient method for producing a perforated web material destined to make absorbent items for personal hygiene or of another type, filters or in general to produce items that require the presence of a flexible perforated sheet.
  • the invention provides a method of producing a perforated web material, in which the web material is fed through a nip between a first roller and a second roller rotating in opposite directions and pressed against each other, the first roller being provided with protuberances for perforation, characterized in that the web material is heated before it travels through said nip.
  • perforation of the web material in the nip between the two rollers requires a certain stay time between the rollers and the supply of a certain amount of energy. Perforation takes place through the combined action of pressure and heat supplied to the web material and (if there is a difference in peripheral speed between the two rollers) through the mechanical effect caused by this difference in speed.
  • the higher the feed speed of the web material the lower the stay time of the material in contact with the perforator rollers. This makes perforation critical.
  • the need to obtain increasing production rates is limited by the need to keep the web material engaged between the perforator rollers for the time required to guarantee correct perforation over the entire width of the material and along its entire longitudinal extension.
  • the web material reaches the nip between the perforator rollers preheated, it is possible to reduce not only the operating temperature but also the pressure and percentage of slippage, that is the difference between the peripheral speeds.
  • the reduction in pressure and of the difference in relative speed reduces the compression stresses and above all bending stresses to which the tips or protuberances provided on the first roller are subjected. Consequently, the protuberances may be produced of a greater height with consequent advantages with regard to the thickness of the finished product, in particular when this is constituted by a layer of textile fibres or comprises a layer of this type.
  • the final thickness of the perforated material is an important factor for the subsequent applications of the semi-finished material.
  • top sheet In fact, to produce sanitary towels, for example, it is important for the top sheet to be considerably thick, to isolate as much as possible the external surface of the absorbent product (which comes into contact with the skin of the user) from the layer underneath the top-sheet which absorbs body fluids. This characteristic of increased thickness of the web material is defined as "three-dimensionality" of the material.
  • the web material is preheated before being fed into the nip between the rollers, this does not preclude at least one or both of the perforator rollers from being heated. Moreover, when necessary they may be made to rotate at different peripheral speeds, although it is generally possible to reduce this difference in speed to lower values than those used in prior art systems.
  • the peripheral speeds of the two rollers defining the nip through which the web material is fed may be the same as or different from each other, also as a function of the characteristics of the web material to be perforated.
  • the speeds will differ from each other and in particular the peripheral speed of the roller provided with protuberances will be higher than the speed of the smooth roller.
  • the web material is a nonwoven fabric.
  • the nonwoven fabric may be produced already bonded with one of the techniques known in the field and the nonwoven fabric may be fed to the production line of the perforated material for example by unwinding it from a roll.
  • the nonwoven fabric is produced by a line that also performs perforation.
  • a station may be provided to form a web of unconsolidated (unbonded) fibres, which is fed in succession to a heating station and to the calender composed of the two perforator rollers. In this way, together with heating and/or perforation, consolidation of the fibres by heating may also be performed in the heating station and/or the nip between the two rollers.
  • the method comprises the following phases:
  • Heating and bonding may be performed by an air-through system.
  • This technique to consolidate or bond the webs of fibres is known to those skilled in the art and consists in making hot air flow through the web of fibres.
  • the temperature of the air is sufficiently high to cause partial melting and/or plasticization of the fibres which bond with one another.
  • the web of fibres is constituted totally or in part by so-called bicomponent fibres, that is with a core formed by a polymer with higher plasticization and melting temperatures compared to the polymer forming the external sheath enclosing the core.
  • the fibres may also be consolidated with other techniques known in the field of nonwoven fabrics, for example by applying a bonding agent which may also be a heat-activated bonding agent, that is causing adhesion when the web is heated. It is also possible to perform bonding by mechanical needle-punching, preferably on the cold web, and therefore before it is fed to the heating station.
  • a bonding agent which may also be a heat-activated bonding agent, that is causing adhesion when the web is heated. It is also possible to perform bonding by mechanical needle-punching, preferably on the cold web, and therefore before it is fed to the heating station.
  • the method may comprise the following steps:
  • the web material may be constituted, rather than by a single web of fibres, also by several web of fibres produced in series or also combined and consolidated in a production phase different from the perforation phase.
  • two or more webs produced by two or more machines, such as carding machines or similar may be fed along respective feed paths and combined before perforation.
  • the several webs may for example be superimposed before entering a single heating station in which preheating and joining together of the webs and bonding of the fibres is performed.
  • the webs may simply be preheated in the heating station and joined together and bonded in the nip between the rollers.
  • intermediate solutions may be used, in which part of the reciprocal joining of the webs and/or consolidation (bonding) of the fibres of each web takes place partly in the heating station and partly in the nip between the rollers.
  • the individual webs may be individually bonded and preheated in respective heating and bonding stations and then joined together by lamination in the nip between the rollers.
  • the web material may also be constituted by a composite structure comprising for example a layer of nonwoven fabric or a web of unconsolidated fibres and a plastic film. Also in this case combining and reciprocal bonding of the layer of fibres and the plastic film may take place in the heating station, in the nip between the rollers or also in a separate and additional station, for example upstream of the heating station.
  • the invention relates to a production line to produce a perforated web material, comprising at least a path to feed a web material to a perforation station comprising a first roller and a second roller rotating in opposite directions and pressed against each other, defining a nip through which the web material is fed, the first roller being provided with protuberances for perforation.
  • a heating station is provided upstream of said perforation station, through which said feed path passes and in which the web material is preheated before being fed to said perforation station.
  • the production line comprises a machine 1 to produce a web material N.
  • the material is advantageously a nonwoven fabric obtained starting from a web of unconsolidated fibres produced by the machine 1.
  • This may be a carding machine, a rando-webber or another machine suitable to produce a web of fibres. Therefore, in the first part of the production line the web material is constituted by a web of unconsolidated fibres.
  • a heating station 3 which may be constituted by a consolidation station using air-through technology, is positioned along the path of this web material.
  • the web material N is a nonwoven fabric which has a higher temperature compared to the ambient temperature.
  • the temperature of the web material N may be around 40-80°C and preferably around 60°C, although this must not be intended as a binding value.
  • the web material N preheated in this way is fed to a calender 5 comprising a first roller 7 and a second roller 9.
  • the rollers 7 and 9 are counter-rotating around respective axes parallel with each other and define a nip 11 through which the web material is fed.
  • Means to feed and draw the web material, represented schematically by pairs of rollers, to impart the required speed to the web material, may be positioned upstream and/or downstream of the rollers 7 and 9.
  • the top roller 7 is equipped with a plurality of protuberances or tips 7P, visible in particular in the enlarged section in Fig.7 .
  • the section of the protuberances may be square, circular, elliptical, rectangular or of any other suitable shape, as a function of the shape required for the holes to be produced in the web material N.
  • the second roller 9, on the other hand, has a smooth surface and may be provided with an elastically yielding surface. Through the effect of the pressure between the rollers and by further supply of heat through one or both of the rollers 7, 9 the web material is perforated as shown in the schematic and enlarged detail in Fig.2 , where the holes are indicated with F. Perforation may also be performed with the aid of reciprocal slippage of the protuberances 7P of the roller 7 in relation to the surface of the roller 9, providing a difference in peripheral speed between the two rollers.
  • the web material N reaches the nip 11 preheated, a plurality of advantages are obtained.
  • the quantity of heat to be supplied to the web material by the rollers 7, 9 to reach the temperature required for perforation is lower. Therefore, the temperature of the rollers may be kept lower and/or the time for which the web material N remains in contact with the rollers may be reduced. This means that the production rate may be higher than the production rate obtainable with traditional systems in which the web material comes into contact with the rollers when it is still at ambient temperature.
  • the time for which the web material remains in contact with the rollers 7, 9 may be kept substantially the same as traditional systems, obtaining more reliable perforation.
  • FIG.4 shows the overall time ⁇ t during which the web material N is in contact with at least one of the two rollers 7, 9. The lower the feed speed of the web material the higher this time is.
  • the time ⁇ t is required to perform: heating of the web material, at least partial melting of it in the areas in which it is to be perforated and tearing to form the perforation, through the difference in peripheral speed between the two rollers.
  • the times required for these three operations are indicated in Fig.4A with ⁇ t R , ⁇ t F and ⁇ t S respectively.
  • the procedure must be reliable, that is correct perforation of the web material must be guaranteed in the finished product in the entire area subject to perforation. Areas in which perforation is incomplete are not admissible. Since the rollers 7 and 9 become deformed by their own weight forming a camber, situations may occur in which the web material is correctly perforated in the centre and incorrectly perforated in the areas nearer the edge.
  • Preheating of the web material eliminates these drawbacks increasing the reliability of the procedure without having a high incidence on power consumption or on wear. Indeed, as can be seen in Fig.4(B) , if the web material reaches the nip 11 preheated, the entire time ⁇ t during which the web material remains in contact with the rollers 7, 9 is utilized to melt the material (time ⁇ t F , normally lower than the time required in traditional processes) and to perform tearing. The time ⁇ t S available to perform tearing and thus perforation is much higher and this is therefore guaranteed without the need to increase temperature, pressure and/or slippage between the rollers.
  • Fig.4(C) where the interval of total contact time is indicated with ⁇ t1.
  • the time available for tearing is in any case greater than the time in the situation in Fig.4(A) .
  • preheating allows more time to obtain perforation of the material. This increased time available ensures that perforation is obtained even in the most critical areas of the web material, typically along the edges.
  • the power consumption required to preheat the web material is compensated by the increased productivity of the system and by the reduction in thermal energy to be supplied to the rollers 7, 9.
  • the total energy balance shows a reduction in energy per unit of product delivered from the system.
  • each protuberance 7P In traditional rollers the extremely high bending stress deriving from the high pressures between the two rollers and the considerable difference in relative speed makes it necessary for each protuberance 7P to have a large resistant cross section, that is a high value of the dimension D1, which may be a diagonal in the case of rectangular or square section, or a diameter in the case of circular section.
  • the transverse dimension D2 of the end of each protuberance is also dictated by the trend of the cross section along the height H of the protuberance. This causes considerable restrictions both on the dimension of the hole (which depends on D2) and on the density of the holes, that is their reciprocal distance, which depends on D1.
  • the web material delivered maintains a greater volume and in particular a greater thickness.
  • the height H of the tips may be between 0.2 and 3 mm and advantageously between 0.5 and 1.2 mm.
  • the web material N must only be perforated in strips, that is it must have perforated strips and integral strips. This material is employed particularly for the subsequent production of sanitary towels.
  • EP-A-0598970 describes and illustrates a perforator roller to perform this particular type of processing.
  • the roller 7 may have annular areas with protuberances of a reduced height corresponding to the strips of web material to remain integral, alternated by areas equipped with protuberances 7P of an increased height.
  • the protuberances of a reduced height are provided to perform consolidation of the fibres but must not break through the material.
  • this type of processing is particularly critical as a point of balance must be found between the need to avoid perforating the web material and the need to consolidate the fibres along the entire extension of the material. This makes it necessary to machine the roller 7 with extreme precision to obtain extremely accurate differences in the height of the protuberances. If the protuberances of reduced height are too short in relation to the protuberances of increased height this may cause insufficient or total absence of consolidation or bonding of the fibres in the unperforated areas of the web material. On the other hand, if the difference in height is too slight the web material may also be perforted in the strip which should remain integral.
  • the process according to the invention also solves this problem in particular when bonding of the fibres is performed together with preheating in the station 3.
  • perforation is to be performed in the nip between the rollers 7 and 9 and therefore the annular areas of the roller 7 where the web material must not be perforated may even be smooth, that is without protuberances, which avoids the risk of accidental perforation.
  • Fig.3 shows a diagram of a system of this type, where the web material N is fed from a roll R
  • Fig.6 shows a system in which the web material is formed by superimposing two webs V1 and V2 of unconsolidated fibres, fed from two machines 1 A, 1 B. The two webs V1 and V2 are superimposed before entering the heating station 3, where they are joined together simultaneously to bonding of the fibres.
  • Fig.7 shows a different embodiment in relation to Fig.6 , in which the two webs V1 and V2 are heated, and if necessary bonded, in two separate heating stations 3A and 3B.
  • the two preheated and if necessary bonded webs are then fed to the nip 11 of the calender 5, between the rollers 7 and 9 which perform perforation and reciprocal joining of the two layers formed from the two webs V1 and V2.
  • Fig.8 shows a different embodiment in relation to Fig.6 , in which the two webs V1 and V2 are joined together, and if necessary bonded, in a station 2 upstream of the heating station.
  • the station 2 may for example be a mechanical needle-punching station, or even a heating station.
  • Fig. 9 shows a different embodiment in which the web material is constituted by combining a plastic film FP fed from a roll R and a fiber web V fed from a machine 1.
  • the two layers FP and V are combined before entering the heating station 3 and here preheated and if necessary joined together by partial melting of the fibres. Joining together may also be performed, both in this case and in the others described above, for example with an ultrasound heating system, with appropriately positioned melting points.
  • Fig.9 also shows with a dashed line a variant in which the plastic film FP is heated in a separate heating station 3B and combined with the web V, preheated and if necessary consolidated in the station 3, immediately before being fed into the nip 11.
  • the linear pressure, that is the load per unit of length, between the two rollers 7 and 9 may be between 40 and 220 kg/cm and the temperature of the rollers may be between 20 and 250%, according to the type of material treated.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Claims (34)

  1. Verfahren zur Herstellung eines perforierten Stoffmaterials, wobei das Stoffmaterial (N) durch einen Walzenspalt (11) zwischen einer ersten Walze (7) und einer zweiten Walze (9), die In entgegengesetzten Richtungen rotieren und gegeneinander gedrückt werden, gefördert wird, wobei die erste Walze (7) mir Vorsprüngen (7P) zur Perforation versehen ist, dadurch gekennzeichnet, dass das Stoffmaterial vorerwärmt wird, bevor es in den Walzenspalt gefördert wird, und dass der Stoff in einem vorerwärmten Zustand bei einer Temperatur höher als die Umgebungstemperatur in den Walzenspalt gefördert wird.
  2. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass mindestens eine der ersten und zweiten Walze (7, 9) beheizt ist.
  3. Verfahren gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass die erste und zweite Walze mit einer zueinander unterschiedlichen Umfangsgeschwindigkeit rotieren.
  4. Verfahren gemäß Anspruch 3, dadurch gekennzeichnet, dass die erste Walze (7) mit einer höheren Umfangsgeschwindigkeit als die zweite Walze (9) rotiert.
  5. Verfahren gemäß einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Stoffmaterial ein Vliesstoff ist.
  6. Verfahren gemäß Anspruch 5, gekennzeichnet durch:
    • Herstellen mindestens eines Faserstoffs (V);
    • Binden der Fasern zum Bilden eines Vliesstoffs;
    • Zuführen des vorerwärmten Vliesstoffs in den Walzenspalt (11).
  7. Verfahren gemäß Anspruch 6, dadurch gekennzeichnet, dass der Stoff (V) dem Walzenspalt vorgelagert hintereinander hergestellt und gebunden wird.
  8. Verfahren gemäß Anspruch 6 oder 7, gekennzeichnet durch die Phasen:
    • Herstellen mindestens eines Stoffs aus ungebundenen Fasern (V);
    • Zuführen des Stoffs aus ungebundenen Fasern (V) durch mindestens eine Erwärmungs- und Bindestation zum Binden der Fasern und Bilden eines Vliesstoffs;
    • Zuführen des Vliesstoffs, der in der mindestens einen Erwärmungs- und Bindestation vorgewärmt wurde, in den Walzenspalt (11).
  9. Verfahren gemäß Anspruch 8, dadurch gekennzeichnet, dass das Erwärmen und Binden unter Verwendung eines Durchbelüftungssystems durchgeführt werden.
  10. Verfahren gemäß einem oder mehreren der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass der Vliesstoff dem Walzenspalt mit einer Eingangsgeschwindigkeit zugeführt wird, die gleich der oder kleiner als die Umfangsgeschwindigkeit der ersten Walze (7) ist.
  11. Verfahren gemäß Anspruch 12, dadurch gekennzeichnet, dass die zweite Walze (9) mit einer Umfangsgeschwindigkeit rotiert, die kleiner als oder gleich der Umfangsgeschwindigkeit der ersten Walze ist.
  12. Verfahren gemäß Anspruch 10 oder 11, dadurch gekennzeichnet, dass die Zufuhrgeschwindigkeit des Vllesstoffs in den Walzenspalt zwischen 90 % und 100 % der Umfangsgeschwindigkeit der ersten Walze (7) ist.
  13. Verfahren gemäß Anspruch 12, dadurch gekennzeichnet, dass die Zufuhrgeschwindigkeit des Vliesstoffs in den Walzenspalt zwischen 90 % und 110 % der Umfangsgeschwindigkeit der zweiten Walze ist.
  14. Verfahren gemäß Anspruch 12 oder 13, dadurch gekennzeichnet, dass die Umfangsgeschwindigkeit der zweiten Walze (9) zwischen 50 % und 100 % der Umfangsgeschwindigkeit der ersten Walze (7) beträgt.
  15. Verfahren gemäß Anspruch 5, gekennzeichnet durch die Phasen:
    • Herstellen mindestens eines Stoffes aus ungebundenen Fasern (V);
    • Zuführen des Stoffes aus ungebundenen Fasern zu einer Erwärmungsstation (3);
    • Zuführen des in der Erwärmungsstation vorgewärmten Stoffes aus Fasern in den Walzenspalt (11);
    • Binden der Fasern zum Bilden des Vliesstoffs und Perforieren des Stoffs aus Fasern in dem Walzenspalt (11).
  16. Verfahren gemäß Anspruch 15, dadurch gekennzeichnet, dass der Stoff aus ungebundenen Fasern (V) dem Walzenspalt mit einer Eingangsgeschwindigkeit zugeführt wird, die niedriger als die Umfangsgeschwindigkeit der ersten Walze (7) ist, wobei die Umfangsgeschwindigkeit der ersten Walze gleich der oder kleiner als die Umfangsgeschwindigkeit der zweiten Walze (9) ist.
  17. Verfahren gemäß Anspruch 16, dadurch gekennzeichnet, dass dem Stoffmaterial, das aus dem Walzenspalt ausgegeben wird, eine Ausgabegeschwindigkeit verliehen wird, die gleich der oder höher als die Umfangsgeschwindigkeit der ersten Walze ist.
  18. Verfahren gemäß Anspruch 16 oder 17, dadurch gekennzeichnet, dass die Zufuhrgeschwindigkeit des Stoffes aus Fasern in den Walzenspalt zwischen 50 % und 90 % der Umfangsgeschwindigkeit der ersten Walze beträgt.
  19. Verfahren gemäß einem oder mehreren der Ansprüche 5 bis 18, dadurch gekennzeichnet, dass zwei oder mehr Stoffe aus Fasern (V1, V2) zusammengefügt und verbunden werden.
  20. Verfahren gemäß Anspruch 19, gekennzeichnet durch:
    Bilden mindestens eines ersten und zweiten Stoffes aus ungebundenen Fasern (V1, V2); Zusammenfügen des ersten und des zweiten Stoffes miteinander und Konsolidieren der Fasern in der Erwärmungsstation.
  21. Verfahren gemäß Anspruch 19, gekennzeichnet durch:
    • Bilden mindestens eines ersten und eines zweiten Stoffes aus ungebundenen Fasern;
    • Zuführen des ersten und des zweiten Stoffes aus ungebundenen Fasern zu einer oder zwei Erwärmungs- und Bindestationen zum Vorerwärmen und getrennten Binden der Fasern des ersten und des zweiten Stoffes, um zwei Vliesstoffe zu bilden;
    • Zuführen der zwei vorerwärmten Vliesstoffe in den Walzenspalt;
    • Perforieren und miteinander Zusammenfügen der zwei Vliesstoffe in dem Walzenspalt.
  22. Verfahren gemäß einem oder mehreren der Ansprüche 5 bis 21, dadurch gekennzeichnet, dass das Stoffmaterial Bikomponentenfasem umfasst.
  23. Verfahren gemäß einem oder mehreren der Ansprüche 5 bis 23, dadurch gekennzeichnet, dass eine Kunststofffolie (Fp) mit dem Vliesstoff oder mit dem Stoff aus unkonsolidierten Fasern kombiniert wird.
  24. Verfahren gemäß einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Stoffmaterial mindestens eine Kunststofffolie (Fp) umfasst.
  25. Fertigungsstraße zum Herstellen eines perforierten Stoffmaterials, die mindestens eine Strecke zum Zuführen eines Stoffmaterials (V, V1, V2, Fp) zu einer Perforationsstation (7, 9) umfasst, die eine erste Walze (7) und eine zweite Walze (9), die in entgegengesetzten Richtungen rotieren und gegeneinander gedrückt werden und einen Walzenspalt (11) definieren, durch den das Stoffmaterial zugeführt wird, umfasst; wobei die erste Walze (7) mit Vorsprüngen (7P) zur Perforation versehen ist; dadurch gekennzeichnet, dass eine Erwärmungsstation (3) der Perforationsstation vorgelagert vorgesehen ist, durch welche die Zufuhrstrecke hindurchläuft und in welcher das Stoffmaterial vorerwärmt wird, bevor es der Perforationsstation zugeführt wird, wobei die Erwärmungsstation und die Perforationsstation derart angeordnet sind, dass der Stoff in die Perforationsstation in einem vorerwärmten Zustand mit einer Temperatur höher als die Umgebungstemperatur eintritt.
  26. Fertigungsstraße gemäß Anspruch 25, dadurch gekennzeichnet, dass mindestens eine der Walzen der Perforationsstation beheizt ist.
  27. Fertigungsstraße gemäß Anspruch 25 oder 26, dadurch gekennzeichnet, dass die zwei Walzen der Perforationsstation so gesteuert sind, dass sie mit voneinander unterschiedlichen Umfangsgeschwindigkeiten rotieren.
  28. Fertigungsstraße gemäß Anspruch 27, dadurch gekennzeichnet, dass die erste Walze (7) mit einer Umfangsgeschwindigkeit rotiert, die größer als die Umfangsgeschwindigkeit der zweiten Walze (9) ist.
  29. Fertigungsstraße gemäß einem oder mehreren der Ansprüche 25 bis 28, dadurch gekennzeichnet, dass Bindevorrichtungen entlang der Zufuhrstrecke zum Binden der Fasern eines Stoffs aus ungebundenen Fasern und zum Bilden eines Vliesstoffs, welcher der Perforationsstation zugeführt wird, vorgesehen sind.
  30. Fertigungsstraße gemäß Anspruch 29, dadurch gekennzeichnet, dass die Bindevorrichtungen ein Bindesystem des Durchbelüftungstyps umfassen.
  31. Fertigungsstraße gemäß einem oder mehreren der Ansprüche 25 bis 30, dadurch gekennzeichnet, dass sie mindestens eine Maschine (1; 1A, 1B) zum Herstellen eines Stoffes aus Fasern (V; V1, V2) umfasst.
  32. Fertigungsstraße gemäß einem oder mehreren der Ansprüche 25 bis 30, dadurch gekennzeichnet, dass sie Zusammenfügungsvorrichtungen zum Zusammenfügen von zwei oder mehr Schichten, die zum Bilden des Stoffmaterials bestimmt sind, umfasst.
  33. Fertigungsstraße gemäß Anspruch 32, dadurch gekennzeichnet, dass die Zusammenfügungsvorrichtungen Mittel zum Konsolidieren von zwei Stoffen aus Fasern aneinander umfassen.
  34. Fertigungsstraße gemäß einem oder mehreren der Ansprüche 25 bis 33, dadurch gekennzeichnet, dass sie zwei Zufuhrstrecken für mindestens zwei Komponenten, die zum Bilden des Stoffmaterials bestimmt sind, umfasst, wobei die zwei Zufuhrstrecken sich vereinigen, bevor sie durch die Perforationsstation hindurchlaufen.
EP03720856A 2003-04-02 2003-04-02 Verfahren und vorrichtung zur herstellung einer perforierten stoffbahn Expired - Lifetime EP1610932B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2003/000198 WO2004087384A1 (en) 2003-04-02 2003-04-02 Method and device to produce a perforated web material

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EP1610932A1 EP1610932A1 (de) 2006-01-04
EP1610932B1 true EP1610932B1 (de) 2010-08-18

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EP (1) EP1610932B1 (de)
AT (1) ATE477894T1 (de)
AU (1) AU2003224430A1 (de)
DE (1) DE60333869D1 (de)
DK (1) DK1610932T3 (de)
ES (1) ES2349120T3 (de)
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WO (1) WO2004087384A1 (de)

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CA2914927A1 (en) 2013-06-12 2014-12-18 The Procter & Gamble Company The method of perforating a nonlinear line of weakness
EP3007598A1 (de) 2013-06-12 2016-04-20 The Procter & Gamble Company Mithilfe einer perforierungsvorrichtung gebildete nichtlineare schwächelinie
CN104275719A (zh) * 2014-10-24 2015-01-14 张家港瑞泰美弹性材料科技有限公司 一种用于制作点断式手套的点断机
WO2016148894A1 (en) 2015-03-17 2016-09-22 The Procter & Gamble Company Method for perforating a nonlinear line of weakness
WO2016148899A1 (en) 2015-03-17 2016-09-22 The Procter & Gamble Company Apparatus for perforating a web material
WO2016148900A1 (en) 2015-03-17 2016-09-22 The Procter & Gamble Company Apparatus for perforating a nonlinear line of weakness
CN106671185A (zh) * 2016-08-25 2017-05-17 优利康达（天津）科技有限公司 连续式有孔薄膜加工设备
CN106319763B (zh) * 2016-08-25 2019-01-08 厦门延江新材料股份有限公司 一种开孔无纺布及其制作方法
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US20070023135A1 (en) 2007-02-01
ATE477894T1 (de) 2010-09-15
ES2349120T3 (es) 2010-12-28
WO2004087384A1 (en) 2004-10-14
DE60333869D1 (de) 2010-09-30
AU2003224430A1 (en) 2004-10-25
DK1610932T3 (da) 2010-10-11
EP1610932A1 (de) 2006-01-04
TW200502071A (en) 2005-01-16

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